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April 16, 2014

April 16, 2014

Posted by **Jeannie** on Sunday, May 22, 2011 at 4:27pm.

5x + 4y =1

- Algebra -
**Henry**, Sunday, May 22, 2011 at 7:20pmEq1: X + 9Y = 33.

Eq2: 5x + 4y = 1.

Multiply both sides of Eq1 by -5 and add the Eqs:

Eq1: -5X - 45Y = -165.

Eq2: 5X + 4Y = 1.

Sum: 0 - 41Y = -164,

Y = 4.

In Eq1, substitute 4 for y:

X + 9*4 = 33,

X = 33 - 36 = -3.

Solution set: (X,Y) = (-3,4).

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